float jarakcm1;
//pin sensor ultra sonic
byte trigPin1 = 13; // trigerpin
byte echoPin = 12; //echopin
#define kecepatanSuara 0.034

byte led1 = 15;
byte led2 = 2;
byte led3 = 4;
byte led4 = 16;
byte led5 = 17;
byte led6 = 5;
byte led7 = 18;
byte led8 = 19;
byte led9 = 21;
byte led10 = 22;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin, INPUT);

pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT); 
pinMode(led3, OUTPUT); 
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);
pinMode(led6, OUTPUT);
pinMode(led7, OUTPUT);
pinMode(led8, OUTPUT);
pinMode(led9, OUTPUT);
pinMode(led10, OUTPUT);
}

void loop() {
  unsigned long durasi = 0;
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);

  //mencari durasi waktu
  durasi = pulseIn(echoPin, HIGH);

  // kalkulasi jarak
  jarakcm1 = durasi * kecepatanSuara / 2;

  Serial.print("Jarak = ");
  Serial.println(jarakcm1);

// matikan semua LED
digitalWrite(led1, LOW);
digitalWrite(led2, LOW);
digitalWrite(led3, LOW);
digitalWrite(led4, LOW);
digitalWrite(led5, LOW);
digitalWrite(led6, LOW);
digitalWrite(led7, LOW);
digitalWrite(led8, LOW);
digitalWrite(led9, LOW);
digitalWrite(led10, LOW);

// jika jarak kurang dari 10cm maka 1 LED menyala
if(jarakcm1<=10){
  digitalWrite(led1, HIGH);
}
if(jarakcm1>10 && jarakcm1<=20){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
}
if(jarakcm1>20 && jarakcm1<=30){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
}
if(jarakcm1>30 && jarakcm1<=40){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
}
if(jarakcm1>40 && jarakcm1<=50){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
}
if(jarakcm1>50 && jarakcm1<=60){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
  digitalWrite(led6, HIGH);
}
if(jarakcm1>60 && jarakcm1<=70){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
  digitalWrite(led6, HIGH);
  digitalWrite(led7, HIGH);
}
if(jarakcm1>70 && jarakcm1<=80){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
  digitalWrite(led6, HIGH);
  digitalWrite(led7, HIGH);
  digitalWrite(led8, HIGH);
}
if(jarakcm1>80 && jarakcm1<=90){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
  digitalWrite(led6, HIGH);
  digitalWrite(led7, HIGH);
  digitalWrite(led8, HIGH);
  digitalWrite(led9, HIGH);
}
if(jarakcm1>90){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
  digitalWrite(led6, HIGH);
  digitalWrite(led7, HIGH);
  digitalWrite(led8, HIGH);
  digitalWrite(led9, HIGH);
  digitalWrite(led10, HIGH);
}

  // put your main code here, to run repeatedly:
  delay(1000); // this speeds up the simulation
}